Adjustable school-desk



D. GWEN. ADIUSIABLE SCHOOL mask. APPLICATION FILED JANJS. 19H;

Patented Aug- 24, 1920;

INVENTOR 07 25 am Owen ATTORNEY UNITED STATES PATENT OFFICE.

DONHAM OWEN, 0F BERKELEY, CALIFORNIA.

ADJUSTABLE SCHOOL-DESK.

Application filed January 15, 1917.

ley, in the county of Alameda and State of California, have invented certain new and useful Improvements in Adjustable School- Desks, of which the following is a specification.

This invention is an improved desk of the type commonly employed for school room purposes.

The main object of the invention is to provide a desk of this character, simple in construction, having means whereby thetop of the desk and the seat may be conveniently adjusted as to height.

The invention will be hereinafter fully set forth and particularly pointed out in the claim.

In the accompanying drawing Figure l of the drawings, which form part of this specification and the appended claim, shows a side elevation of the adjustable school desk, Fig. 2 is a front view of the same.

Referring to the drawing, a, a, designate the side standards of a desk, having shoulders 7), 7) upon which the adjustable desk section t will rest when in its lowermost position.

To obtain the desired result, the desk section i is provided with two carriers or racks l, confined to an up and downward motion by guides 2, attached to standards a, a. A toothed segment 3, attached to a rock-shaft G, suitably supported, engages the rack gearing and lifts the movable part 4, of the desk when lever 5, which is fastened to rock-shaft 6, is operated. A notched segment '7 secured to the inside of one of the standards a is Specification of Letters Patent.

Patented Aug. 24, 1920.

Serial No. 142,362.

engaged by a pawl carried by lever 5, to hold said lever in any desired adjusted position.

Desk section 4 is provided with a top hinged thereto at 9, and can, if desired, be set in a horizontal position by lifting it, thereby causing leg 10, to drop into groove 11, as

. shown in dotted lines in Fig. 1.

F or the purpose of adding stability and relieving segment 3 from strain, the motion imparted to it is transmitted by shaft 6 to the opposite side of the desk where a duplicate of the lifting device is installed.

The identical principle with a modification of shape of parts, substantially as shown, is employed in the adjustment of the seat 12. Said seat is provided with racks 13, guided by standards a, a, said racks being engaged by toothed segments 14%, provided with levers 15, as shown, locked in suitable manner.

Having thus explained the nature of the invention, and described an operative manner of constructing and using the same, although without attempting to set forth all of the forms in which it may be made, or all of the forms of its use, the following is claimed A desk of the character described comprising standards, carriers guided thereby and provided with rack teeth, an adjustable desk section attached to said carriers, a rock shaft mounted in said standards, quadrants carried by said rock shaft and meshing with the teeth of said carriers, a lever for actuating said rock shaft, and means on said lever and on one of said standards for locking said lever against movement.

In testimony whereof I affix my signature.

DONHAM OlVEN. 

